1996A&A...314..368F

We consider the process of entrainment of the line-emitting clouds by jets in domains of narrow-line emitting regions in Seyfert and radio- galaxies. In our model the clouds penetrate the jet perpendicular to the jet's axis. Several regimes of entrainment are possible. They mostly depend on the value of the "entrainment parameter" ε=t_cr/t_ent, where t_cr is the cloud-jet crossing time and t_ent is the entrainment time. Comparing our calculations with observations, we infer that regimes of ε≪1 and ε≫1 are possibly realised in some astrophysical objects.